The roughness value for given material.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2013

Syntax

C#
`public double Roughness { get; set; }`

Visual Basic
`Public Property Roughness As Double Get Set`

Visual C++
`public: property double Roughness { double get (); void set (double value); }`

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsDisabledDisciplineException	When setting this property: None of the following disciplines is enabled: Mechanical Electrical Piping.